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Imaging Studies I: CT and MRI01:14

Imaging Studies I: CT and MRI

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Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
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Computed Tomography (CT) scan:
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DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
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Radiological investigations, including X-rays and computed tomography (CT) scans, are critical for diagnosing and evaluating various medical conditions. These imaging techniques provide valuable insights into the body's internal structures, aiding in the detection of abnormalities, assessment of disease progression, and development of treatment strategies. This article delves into two primary radiological investigations, chest X-rays and CT scans, outlining their purpose, procedures, and...
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Cardiovascular magnetic resonance imaging, or CMRI, is a non-invasive diagnostic test that employs a magnetic field and radiofrequency waves to create precise images of the heart and arteries. It provides comprehensive information about cardiac anatomy, function, perfusion, and tissue characterization without ionizing radiation.IndicationsCMRI diagnoses various heart conditions, including tissue damage from heart attacks, ischemic heart disease, myocarditis, aortic issues (tears, aneurysms,...
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Imaging Studies for Cardiovascular System V: CT01:28

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Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...
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Related Experiment Video

Updated: Nov 11, 2025

Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging
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Gadolinium-Based Contrast Agents Hypersensitivity: A Case Series.

Eleonora Nucera1, Sara Urbani1, Alessandro Buonomo1

  • 1Allergy Unit, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy.

Journal of Asthma and Allergy
|March 24, 2021
PubMed
Summary
This summary is machine-generated.

Hypersensitivity reactions to gadolinium-based contrast agents (GBCAs) during MRI are rare but poorly understood. This study suggests a potential IgE-mediated mechanism in four patients experiencing immediate adverse reactions and skin hypersensitivity.

Keywords:
IgE-mediated reactionsgadolinium-based contrast agentshypersensitivity

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Area of Science:

  • Immunology
  • Radiology
  • Pharmacology

Background:

  • Gadolinium-based contrast agents (GBCAs) are widely used in magnetic resonance imaging (MRI) for enhanced diagnostic accuracy.
  • While generally considered safe, some patients report hypersensitivity reactions, the underlying mechanisms of which remain largely unknown.
  • Understanding these reactions is crucial for patient safety and optimizing contrast agent protocols.

Observation:

  • This study details four cases of patients who experienced immediate adverse reactions following GBCA administration during MRI.
  • These patients exhibited demonstrated cutaneous hypersensitivity, indicating a localized allergic response.
  • The observed reactions occurred promptly after contrast agent exposure.

Findings:

  • The clinical presentation and cutaneous hypersensitivity in these patients suggest an IgE-mediated hypersensitivity mechanism.
  • This finding points towards an allergic pathway, similar to other common allergic reactions.
  • The study provides evidence linking specific immune responses to GBCA administration.

Implications:

  • These findings may necessitate a re-evaluation of GBCA safety profiles and hypersensitivity testing protocols.
  • Identifying an IgE-mediated mechanism could lead to improved diagnostic and management strategies for patients with suspected GBCA allergies.
  • Further research into GBCA immunology is warranted to elucidate sensitization pathways and develop safer alternatives or preventative measures.